CA2253487A1 - Transceiver with rf loopback and downlink frequency scanning - Google Patents

Transceiver with rf loopback and downlink frequency scanning

Info

Publication number
CA2253487A1
CA2253487A1 CA002253487A CA2253487A CA2253487A1 CA 2253487 A1 CA2253487 A1 CA 2253487A1 CA 002253487 A CA002253487 A CA 002253487A CA 2253487 A CA2253487 A CA 2253487A CA 2253487 A1 CA2253487 A1 CA 2253487A1
Authority
CA
Canada
Prior art keywords
receiver
transmit
loopback
antenna
transmitter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002253487A
Other languages
French (fr)
Other versions
CA2253487C (en
Inventor
John Stanley Rucki
Christopher F. Zappala
Jack Chi-Chieh Wen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia of America Corp
Original Assignee
Lucent Technologies Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of CA2253487A1 publication Critical patent/CA2253487A1/en
Application granted granted Critical
Publication of CA2253487C publication Critical patent/CA2253487C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/15—Performance testing
    • H04B17/19—Self-testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

A wireless base station has a transmitter and receiver. Transmission signals are applied to an antenna through a transmit bandpass filter that is tuned for a transmit band of frequencies. Received signals from the antenna are applied to the receiver through a receive bandpass filter that is tuned for a receive band of frequencies An RF switching array consisting of four RF switches interconnects the output of the transmitter and the input of the receiver such that normal, loopback (self-test), and scanning modes can be performed. In the normal mode, the antenna is connected to the transmitter and receiver through the transmit and receive bandpass filters, respectively. The transmit and signal paths are effectively isolated from each other by three serially-connected open switches. In the loopback mode, the transmitter output is connected to the receiver input. In the scanning mode, the antenna is connected to the receiver through the transmit bandpass filter. The same set of interconnects provides for loopback and normal operation as well as the new scanning operation. The use of switches rather than couplers or couplers for the loopback function reduces noise and crosstalk between transmit and receive signal lines and lower losses in these lines.
CA002253487A 1997-11-26 1998-11-09 Transceiver with rf loopback and downlink frequency scanning Expired - Fee Related CA2253487C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/979,478 US6006112A (en) 1997-11-26 1997-11-26 Transceiver with RF loopback and downlink frequency scanning
US08/979,478 1997-11-26

Publications (2)

Publication Number Publication Date
CA2253487A1 true CA2253487A1 (en) 1999-05-26
CA2253487C CA2253487C (en) 2002-04-16

Family

ID=25526906

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002253487A Expired - Fee Related CA2253487C (en) 1997-11-26 1998-11-09 Transceiver with rf loopback and downlink frequency scanning

Country Status (5)

Country Link
US (1) US6006112A (en)
EP (1) EP0920146A3 (en)
JP (1) JPH11252026A (en)
KR (1) KR19990045547A (en)
CA (1) CA2253487C (en)

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DE19934502A1 (en) * 1999-07-22 2001-01-25 Siemens Ag Radio transmitting and reception device, especially mobile communications terminal
JP4103268B2 (en) * 1999-10-14 2008-06-18 株式会社デンソー Wireless communication device
US6738601B1 (en) * 1999-10-21 2004-05-18 Broadcom Corporation Adaptive radio transceiver with floating MOSFET capacitors
US7555263B1 (en) 1999-10-21 2009-06-30 Broadcom Corporation Adaptive radio transceiver
US6782330B1 (en) * 2001-03-22 2004-08-24 Lockheed Martin Corporation Satellite signal waveform monitor
US6856788B2 (en) * 2001-04-20 2005-02-15 Mastek International Wireless IC interconnection method and system
US6965756B2 (en) * 2001-10-05 2005-11-15 Adtran, Inc. RF loopback test apparatus for data radio transceiver
KR20040093142A (en) * 2002-03-14 2004-11-04 코닌클리케 필립스 일렉트로닉스 엔.브이. An in-home receiver system
KR100498352B1 (en) * 2003-04-23 2005-07-01 엘지전자 주식회사 Channel synchronization apparatus for time division duplex mobile terminal
JP2009503987A (en) * 2005-07-29 2009-01-29 エヌエックスピー ビー ヴィ Wireless transceiver with self-calibration for out-of-band jamming rejection
JP4489083B2 (en) * 2007-01-16 2010-06-23 株式会社東芝 transceiver
JP4479931B2 (en) * 2008-03-11 2010-06-09 日本電気株式会社 Communication apparatus, distortion compensation circuit, and distortion compensation method
US8598988B2 (en) * 2009-03-27 2013-12-03 Osa Acquisition, Llc Systems and methods for controlling serially connected transmitters in RFID tag tracking
JP5075188B2 (en) * 2009-12-03 2012-11-14 株式会社エヌ・ティ・ティ・ドコモ Wireless communication terminal
WO2012084037A1 (en) * 2010-12-22 2012-06-28 Epcos Ag Circuit arrangement for rf loopback
WO2012167344A1 (en) 2011-06-06 2012-12-13 Research In Motion Limited Systems and methods for testing radio-based devices
US9628203B2 (en) * 2014-03-04 2017-04-18 Qualcomm Incorporated Analog built-in self test transceiver
JP6435682B2 (en) * 2014-07-23 2018-12-12 富士電機株式会社 Wireless communication device
TWI707553B (en) * 2019-09-09 2020-10-11 瑞昱半導體股份有限公司 Radio-frequency circuit
FR3102319B1 (en) * 2019-10-22 2022-07-29 Commissariat Energie Atomique RADIO FREQUENCY INTEGRATED CIRCUIT AND CORRESPONDING TEST METHOD
WO2021230779A1 (en) * 2020-05-11 2021-11-18 Telefonaktiebolaget Lm Ericsson (Publ) A microwave radio transceiver test arrangement
EP3910351B1 (en) 2020-05-13 2024-03-20 NXP USA, Inc. Integrated circuit and method of performing a bist procedure
US11374605B1 (en) 2021-04-19 2022-06-28 Nxp Usa, Inc. Self-diagnosis system for wireless transceivers with multiple antennas

Family Cites Families (14)

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Publication number Priority date Publication date Assignee Title
US4123759A (en) * 1977-03-21 1978-10-31 Microwave Associates, Inc. Phased array antenna
JPH0779299B2 (en) * 1986-08-30 1995-08-23 日本電気株式会社 Portable radio
JPH0494224A (en) * 1990-08-09 1992-03-26 Fujitsu Ltd Radio telephone system
US5065120A (en) * 1990-09-21 1991-11-12 Motorola, Inc. Frequency agile, dielectrically loaded resonator filter
US5337316A (en) * 1992-01-31 1994-08-09 Motorola, Inc. Transceiver self-diagnostic testing apparatus and method
JPH07106921A (en) * 1993-10-08 1995-04-21 Uniden Corp Fast scan radio receiver
US5406617A (en) * 1993-11-01 1995-04-11 Bauer; Ronald Cordless telephone/entry intercom system
JP3078177B2 (en) * 1994-07-01 2000-08-21 三菱電機株式会社 Wireless device
JPH08293846A (en) * 1995-04-19 1996-11-05 Sony Corp Transmission/reception device
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JP3100111B2 (en) * 1995-06-26 2000-10-16 株式会社エヌ・ティ・ティ・ドコモ Multiband high frequency circuit for mobile radio
US5675629A (en) * 1995-09-08 1997-10-07 At&T Cordless cellular system base station
US5781864A (en) * 1996-05-20 1998-07-14 Metawave Communications Corporation Cellular system conditioner which overrides a disconnect for active radios wirelessly communicating with mobiles located in pre-identified territorial positions
US5712603A (en) * 1996-08-09 1998-01-27 Kmw Usa, Inc. Multipole multiposition microwave switch with a common redundancy

Also Published As

Publication number Publication date
EP0920146A3 (en) 2002-08-14
EP0920146A2 (en) 1999-06-02
US6006112A (en) 1999-12-21
KR19990045547A (en) 1999-06-25
JPH11252026A (en) 1999-09-17
CA2253487C (en) 2002-04-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20081110